Ada in the Paris Metro System

The Ada language has been chosen to develop the automatic piloting system on the
new Paris underground line METEOR. Reliability, security and long-term software
lifecycle were determining criteria for the choice of the language.

Developed on behalf of the Paris Transportation Authority (RATP) by GEC-Alsthom
for the trains and Matra Transport for the automatic systems, the 20-km long
METEOR line will link the South-West and North-East Parisian suburbs and will be
equipped with 18 railway stations. The trains will feature the Matra Transport
automatic piloting system. This system automatically controls the train traffic,
regulates train speed, manages variou alarm devices, and allows traffic of both
automatic and non-automatictrains on the same line.